just tried to build docs on a fully-updated fedora 31 system, and got:

$ make htmldocs SPHINX htmldocs --> file:///home/rpjday/uboot/git/doc/output make[2]: Nothing to be done for 'html'. Running Sphinx v2.1.2

Extension error: Could not import extension kerneldoc (exception: cannot import name 'AutodocReporter' from 'sphinx.ext.autodoc' (unknown location)) make[1]: *** [doc/Makefile:68: htmldocs] Error 2 make: *** [Makefile:1984: htmldocs] Error 2 $

i don't know enough about sphinx to know what to do with that diagnostic -- what is the current way to build u-boot docs?

rday